Shoe



'l Patented ret. 11, 1941 I i 2,231,551

UNITED STATES PATENT OFFICE suon Arthur c. sewau, Auburn, MaineQ Application Marcil 31, 1937, serial No. 134,039

-2 claims. (ci. 31e- 44) My invention relates to insoles, and has among cemented to such material by use of -latex or its objects the provision of an. insole of improved rubber solution which is applied to the edges 31 construction particularly suitable for use in conof the uppers or to the edges of the insole and nection with shoes the uppers of which are cewhile the` cement is Wet the parts pressed to- 5 mented to the insole.' gether, such a construction being shown in Fig. 5

The invention will be best understood from 9. Where the insole at the toe portion thereof is the following description when read in the light formed of a single thickness of berboard this of the accompanying-drawing, the scope of which operation would not ybe possible, because leather invention will be more lparticular-ly pointed out o'r fabric cannot be cemented to ilberboard if the in the appended claims. parts are applied while the latexor other rubber l0 In the drawing: cement is wet, it being necessary in such situ- Figure 1 is a plan of the upper side of an inations to permit the cement to dry'sumciently to sole constructed according to the invention; secure the requisite tackiness, and for economic Fig. 2 is a section on the line 2-2 of Fig. 1 reasons this is more or less impractical'in the Fig. 3 is a plan of the upper side of a modified shoe factory. l5 form of insoleconstructed according to the in- Preferably the lower sheet Il is thinner than vention; the upper sheets of the insole to enable the joints Fig. 4 is a section on the line 4-4'of Fig. 3; at the upper side of the insole to be skived and Fig. 5 is a pian of the sheet from which may secure the best posible, joints between them- .20 be cut the insoles constructedv according to Figs. Commonly the minimunt thickness of insoles is 3 and 4;

tion, with parts omitted.

l and 2; about 3-irons, and for ch an insole the lower Fig. 6 is a lsection on the line 6-6 of Fig. 5; sheet may be l-iron in thickness and the upper Fig. 'z is a pian of the sheet from which may sheets cach 2-1rons in thickness. Applicant has be cut the insoles constructed according to Figs. 'found thtit 1S impractical fr0 form SkVed joints of material less than about 2irons in thickness 25 Fig. 8 is a. section on the line 8--8 of Fig, 7; 'and Obtain a. Smooth uniform joint. Therefore, and i in any event, no matter what the thickns of Fig. 9 is a vertical transverse section through the 1115016. the Upper Sheets Ordinarily Should not the toe portion of a shoe according to the invenbe less than about 2'ir0ns in thickness. The

Referring particularly to Figs. 1 and 2, the as, for example, the thickness of ordinary wrciii insole illustrated comprises at the upper side Ping Peper- Were the Sheets at the upper Side thereof a'toe portion I and a. heel portion 3, 0f the insole not skived it 'would be necessary to' each of which is formed of relatively stur mafcrm them with abutting joints. which would terial such as stiff hardnberboard, while the necessitate extreme care in forming the edges 85 shankportion 5 and ball portion'l are formed of 4of the sheetsso that there would b e no openings a singlesheet of relatively flexible material such betWeell them- Further. When the S1106 1S Worn as rubber impregnated brous cellulose material` these abutting edges would tend' to open and as, for example, flannel, or bibulouspaper-iormed thus present a defective insole. Although form- 40 of alpha cellulose fibers, impregnated with latex ing the sheets with abutting` joints is not pre- 4,0 or rubber solutionor dispersion. As shown.' the cluded, the skived joints nevertheless present a adjacent edges of' the\heel and shank portions far superior construction. v andtoe and ball portions of the several sheets 'I'he insole constructed according to Figs. 3 are united by overlapping skivd cemented joints and '4 is similar to that above described except 9. As illustratedrthe .entire lower 'side of the that the heel portion 3 and shank portion i6 at 45 i insole is -formed of a single sheet Il of flexible the upper side oi' the insole are formed of asingle material as, for example, the same material as sheet of stii hard berboardso as to secure a that of which the shank and ball portions are stiff shank as well asheel portion. The ball porformed, which sheet I I is cemented tothe sheets tion 'i at the upper side of the insole is formed at the upper side of the insole. of a'sheet of thev above described exib1ema` 50 It will be observed that' the above described terial, and the toe portion I of stii hardflberinsole presents atthe under side thereof a sheet board. which tln'oi'ighoutY its extent is rubber impreg- In order to secure insoles of uniform characternated brous cellulose material. VIt vhas been istics, and to eect economic'savings, the insoles lower sheet however, if desired, may be very thin 30 found that the uppers 35 of shoes may be readily according to Figs. 1 and 2 may be cut from an 55 sheet at one side comprises a central zone I3 of the above described flexible material; the Width of the zone being equal to the combined lengths of the shank portion 5 andball portion 'I of the insole. At opposite sides of this `zone are zones I5 of the above described stili hard berboard secured thereto by skived cemented joints I1 corresponding to the joints 9 of the insole, the zones l5 being of sucient Width to form material for the toe portion I and heel portion 3 of theinsoles when the latter are cut transversely from the sheet. At the opposite side of the sheet is a sheet I9 of flexible material corresponding to the sheet Il at the lower'side 'of the insole. The insoles may be cut transversely from this sheet along the dotted lines 2l, 'the dies preferably being so formed as to cut a plurality of insoles at a time.

Similarly the insoles illustrated vby Figs. 3 and 4 may be cut from the sheet illustrated by Figs. 7 and 8. This sheet comprises .a central longitudinally extending zone 23 of the above described exible material of Width corresponding to the length of the ball portion 1 ofthe insole. Secured to one side of this sheet by a skived cemented joint 25 is a sheet forming a zone 21 of stiff hard berboard of Width` slightly greater than the length of the toe portion of the insole. Secured to the opposite side of the vsheet 23 by a similar skived cemented joint 25 is a sheet forming a zone 29 of stiff hard fiberboard of width slightly greater than the combined lengths of 'the shank and heel portions of the insole. At the opposite side of the sheet is cemented a sheet 3| of the above described flexible material corresponding to the sheet |l of the insole. The

insoles according to Figs. 3 and 4 may be cut from this sheet along the dotted lines 33 in the manner above described.

In forming the sheets illustrated by Figs. 5 and 7 preferably the parts are cemented together by use of rubber cement which extends over the entire surfaces `of the contacting parts. This cement preferably is allowed to dry to the requisite degree of tackiness before the parts are applied. Conveniently the side of the sheet having the iberboard zones is first formed as a separate loperation. To the sheet thus formed is cemented the flexible sheet 3 l.

It Will be understood that Within the scope of the appended claims wide deviations may be -made from the forms of the invention described Without departing from the spirit thereof.

I claim;

1. A shoe having, in combination, aninsole having toe and heel portions comprising sheets of relatively stiff material, a sheet of relatively flexible material having its upper surface substantially continuous with the upper surfaces of said sheets of relatively stiff material and extending from-oneto the other and including at least the ball portion of the insole, a sheet of relatively flexible rubber impregnated brous material secured to the under sides of said relatively stiff sheets and rst mentioned sheet of relatively flexible material, and uppers cemented to said :rubber impregnated sheet at at least the toe and ball portions of the insole.

2. A shoe according to claim 1 in which the relatively stiff sheets .are of relatively hard berboard and the rubber impregnated sheet is secured by cement to the other sheets.

ARTHUR C. SEWALL. 

